Mean differences in aerobic and anaerobic physical fitness test results of SARS-CoV-2-infected and non-infected combatant and non-combatant cadets*
| Variable | Infected, MSD (n)† | Non-infected, MSD (n)† | P value‡ | ||||||
| M | F | P value | Total | M | F | P value | Total | ||
| Non-combatant cadets (n) | 91 | 520 | |||||||
| Aerobic physical fitness test | |||||||||
| 3000 m race (s) | 20.58 (24) | 9.15 (27) | 0.399 | 14.53 (51) | –19.19 (265) | –19.19 (145) | >0.999 | –19.19 (410) | <0.001 |
| Anaerobic physical fitness test | |||||||||
| Push-ups (n) | 2.67 (34) | 1.68 (54) | 0.536 | 2.07 (88) | –7.73 (198) | 3.07 (309) | <0.001 | –1.15 (507) | 0.80§ |
| Combatant cadets (n) | 33 | 564 | |||||||
| Aerobic physical fitness test | |||||||||
| 3000 m race (s) | –2.72 (25) | 0 | –2.72 (25) | –22.84 (339) | –27.62 (67) | 0.377 | –23.63 (406) | <0.001 | |
| Anaerobic physical fitness tests | |||||||||
| Pull-ups (n) | 2.65 (26) | 0 | 2.65 (26) | 1.81(365) | 1.20 (70) | 0.08 | 1.71 (435) | 0.08 | |
| Parallel bars (n) | −0.85 (26) | 0 | −0.85 (26) | 0.22 (367) | 0.71 (70) | 0.255 | −0.30 (437) | 0.11 | |
| Squat-thrust (n) | 0.001 (26) | 0 | 0.001 (26) | 0.24 (367) | 0.001 (70) | 0.348 | 0.19 (437) | 0.60 | |
| Sprint run, 150 m×2 (n) | −0.52 (25) | 0 | −0.52 (25) | −0.24 (339) | −1.29 (67) | <0.001 | −0.41 (406) | 0.82 | |
| Postexercise shooting hits (n) | 0.22 (27) | 0 | 0.22 (27) | −0.04 (402) | −0.25 (65) | 0.47 | −0.07 (467) | 0.44 | |
*MSD: the mean result at the end minus the mean result at baseline. Positive values indicate deterioration, while negative values indicate improvement.
†The number of cadets whose results were recorded.
‡Outcomes of comparisons between the totals of the two cohorts.
§The Wilcoxon signed-rank test compared the MSDs due to asymmetric distribution, all other continuous variables were compared using independent-samples t-test.
F, female; M, male; MSD, mean score difference.